Changes to mirrors in support of metadata access at runtime. Assumes VM changes in flight.…

runtime/lib/mirrors.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "include/dart_api.h"
 #include "include/dart_debugger_api.h"
 #include "vm/dart_api_impl.h"
 #include "vm/bootstrap_natives.h"
 #include "vm/dart_entry.h"
 #include "vm/exceptions.h"
@@ skipping 1261 matching lines @@
 
   Dart_Handle wrapped_result = CreateInstanceMirror(result);
   if (Dart_IsError(wrapped_result)) {
     Dart_PropagateError(wrapped_result);
   }
   Dart_SetReturnValue(args, wrapped_result);
   Dart_ExitScope();
 }
 
 
+void NATIVE_ENTRY_FUNCTION(LocalMirrorImpl_metadata)(
+    Dart_NativeArguments args) {
+  Dart_EnterScope();
+  Dart_Handle mirror = Dart_GetNativeArgument(args, 0);
+
+  Dart_Handle reflectee = UnwrapMirror(mirror);

[ahe, 2013/06/11 08:48:10]

What happens if mirror is not a mirror?

[gbracha, 2013/06/12 21:21:18]

The first argument is the receiver. The only way you would get a non-mirror here
is if one ties code in a non-mirror class to this native entrypoint. This is
true of  other parts of the VM mirror implementation as well.

+  Dart_Handle result = Dart_GetMetadata(reflectee);
+  if (Dart_IsError(result)) {
+    Dart_PropagateError(result);
+  }
+  ASSERT(Dart_IsList(result));
+  Dart_SetReturnValue(args, result);
+  Dart_ExitScope();
+}
+
 void HandleMirrorsMessage(Isolate* isolate,
                           Dart_Port reply_port,
                           const Instance& message) {
   UNIMPLEMENTED();
 }
 
 }  // namespace dart